Piano-truck.



No. 682,662. Patented Sept. l7, I90l. s. snnmowmzw.

PIANO TRUCK.

(Application filed Dec. 10, 1900.)

No Model.)

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UNITED STATES PATENT OFFICE.

SETH BARTHOLOMEW, OF STURGIS, MICHIGAN.

PIANO-TRUCK.

SPECIFICATION forming part of Letters Patent No. 682,662, dated September 17, 1901.

Application filed December 10, 1900. Serial No. 39,279. (No model.)

To all whom it may concern:

Be it known that I, SETH BARTHOLOMEW, a citizen of the United States, residing at Sturgis, in the county of St. Joseph and State of Michigan, have invented new and useful Improvements in Piano-Trucks, of which the following is a specification.

My invention relates to improvements in piano-trucks in which an end roller is raised or depressed and vertical rods engage a crossbar; and the object of my invention is to provide a simple method, first, whereby the truck may be moved in any direction, and, second, whereby the piano can be effectually secured to the truck.

I attain this object by the mechanism illustrated in the accompanying drawings, forming a part of this specification, in which Figure l is a plan view of a piano-truck. Fig. 2 is a side elevation thereof, showing my device. Fig. 3 is a detail view of my device.

Similar letters refer to similar parts in all the views.

A is the bed-frame of a piano-truck. B represents steel spring-plates bolted beneath the side pieces a of frame A and turned at their exterior ends, forming journals in which a roller 0 revolves. Arectangular bar D, pivoted at both ends, rotates in journals E, secured beneath the frame A, and has a lever F thereto attached operating through the slot b in the frame A, by which it actuates the springs 13 for the purpose of lowering and raising the roller 0. The side pieces a of the frame A are chamfered off toward the outer ends to permit the spring-plates B to lie close thereto, and thus raise the roller 0, and a square notch is out into the extreme outer ends of a to receive the ends of the bar D when turned to a horizontal position for the same purpose.

rods 0 pass through the frame A by the slots (:1 and e and are furnished with nuts and Washers at both ends and pass through a cross-bar I, designed to rest on the top of the piano, securing it to the truck.

In operating the device after the piano is placed on the truck the rods (3 are set in the slots d and c. The cross-bar I is put on top of the piano, the rods 0 passing through openings therein. The nuts and washers are then screwed thereon. The bar D being set in a vertical position pushes down the springplates B, placing the bottom of the rollers G on the same plane with that of the roller G and the wheels H. The truck can be now run in a straight line. When it becomes neeessary to change direction, the lever F is pressed by the foot, which rotates the bar D into a horizontal position and releases the springs B, which then lie up close to the chamfered surfaces of the side pieces 0,, thus lifting the roller 0 and placing the weight of the truck on the central wheels H. The truck can then be readily moved in any desired direction.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-

l. The combination in a piano-truckof two spring-plates journaled at the ends, with a roller revolving therein, all substantially as set forth.

2. In a piano-truck the combination of a couple of spring-plates journaled and having a roller operating in said journals, with a rectangular bar, and a lever attached to said rectangular bar, all substantially as and for the purpose described.

3. The combination in a piano-truck of a couple of rods having nuts and washers with a cross-bar secured to said rods, all substantially as and for the purpose set forth.

SETH BARTHOLO'MEW.

Witnesses:

WM. MOLOUGHLIN, H. L. ANTHONY. 

